Since you're choosing to include this income in your tax return, TurboTax will generate Form 8814 for you as you go through the interview in the program. You won't need to delete the childrens' imported info, as it is designated using their name(s) and SSNs. I just filed for my daughter, whose son had a very small amount of dividend income. The program worked like a dream and created Form 8814 for the joint return of my daughter and husband. The TurboTax FAQ below will explain how to enter the income into your TT program.
https://ttlc.intuit.com/questions/2899934-how-do-i-report-my-child-s-investment-income
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
